QueryData::prepare

static function prepare(Entity\Query $query, $dataTypeId = null)
{
	$fields = self::getSelectFields();
	foreach ($fields as $alias => $field)
	{
		if (is_numeric($alias))
		{
			$alias = '';
		}

		$query->addGroup('ID');
		$query->addSelect($field, $alias);
	}

	return Helper::prepareQuery($query, $dataTypeId);
}